Message type: E = Error
Message class:  RSO_SEGR - Messages for TLOGO = SEGR  (Semantic Group of ADSOs) 
Message number: 090
Message text: Error while changing the database tables (table &1)
Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.
To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.
Unfortunately, there isn't any extra information in this error notice.
First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).
Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.
You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.
The SAP error message RSO_SEGR090 typically indicates an issue related to the database tables in the context of SAP BW (Business Warehouse) or SAP BI (Business Intelligence). This error can occur when there is an attempt to change or modify a database table, and it usually points to a problem with the underlying database structure or configuration.
Cause: Database Locking: The table might be locked by another process or user, preventing changes. Insufficient Authorizations: The user attempting to make the changes may not have the necessary authorizations to modify the database table. Data Consistency Issues: There may be inconsistencies in the data that prevent the operation from completing successfully. Technical Issues: There could be technical issues with the database itself, such as corruption or misconfiguration. Transport Issues: If the changes are part of a transport request, there may be issues with the transport itself.
Solution: Check Locks: Use transaction code SM12 to check for any locks on the
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
RSO_SEGR071 You are not authorized to change Semantic Group '&1'
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
RSO_SEGR070 You are not authorized to display Semantic Group '&1'
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
RSO_SEGR110 Error while building the DTA structure of provider &1
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
RSO_SEGR111 Error while building the DTA_PRO structure of field &2 of provider &1
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
Click on this link to search all SAP messages.